Control mechanism for carbureters,



E. 0. SATHER.

CONTROL MECHANiSM FUR GARBUHETERS APPLICATION min APR. 29. 1918.

1,307,704. Patented June 24, 1919.

2 SHEETS-5HEET I.

i'zaaiaia" E. O. SATHER.

CONTROL MECHANISM FOR CARBURETERS.

APPLICATION FILED APR. 29.1918

Patented June 24, 1919.

2 $HEETSSHEET 2.

El 1402 M to:

I Giro Lungs EDMUND o. sarnna, or OAKLAND, CALiFORNIA.

CONTROL MECHANISM FOR cARBUIiETERs.

Application filed April 29, 1918.

To allo /1.0111 it may concern:

Be it known that I, EDMUND O. SAll-TER, a citizen of the United States,residing at Oakland, in the county of Alameda and State of California,have invented certain new and useful Improvements in Control Mechanismfor Carbureters, of which the followin is a specification.

This invention relates to an improved liquid fuel compensating devicefor can bureters and has as its primary object to provide a device ofthis character adapted for attachment to different types of carburetersalready in use for controlling the liquid fuel valve of the carburetorsynchronously with the adjustment of the throttle valve thereof to thusdirectly regulate the flow of fuel mixture through the carbureteraccording to the speed of the engine with which it is associated.

The invention has as a further object to provide a device of thischaracter adapted to couple the needle fuel valve of the carbureter withthe lever of the throttle valve thereof, whereby when the said lever isswung to open or close the throttle valve, the fuel valve will besimultaneously rotated and opened or closed proportionately to thusincrease or diminish the supply of liquid fuel into the carburetor asthe throttle valve is opened or closed.

A still further object of the invention accordingly resides in theprovision of a device of the above described character adapted toautomatically operate the fuel valve of the carburetor for increasingthe richness of the fuel mixture in direct ratio to any acceleration inthe speed of the engine and likewise automatically decreasing therichness of the fuel mixture in direct ratio to any slowing down of theengine speed to consequently insure a proper mixture at practically allspeeds of the engine.

The invention has as a further object to provide a device wherein theopening or closing movement of the liquid fuel valve may be adjustablyvaried with respect to a given opening or closing movement of thethrottle valve in order that the ratio of increase or decrease in therichness of the fuel mixture incident to the opening or closing movementof the throttle valve may be regulated or varied.

And the invention has as a still further object to provide a devicewhich will be of a particularly simple nature and which maySpecification of Letters Patent.

Paton ted June 24, '1 919.

-Seria1N0.231.512.

be applied without the necessity for any structural change in thecarburcter.

Other and incidental objects will appear as the description proceeds. Inthe drawings wherein I have illustrated the preferred embodiment of theinvention, and wherein similar reference characters designatecorresponding parts throughout the several vlews:

Figure 1 is a side elevation showing my improved device applied to aconventional type of carbureter,

Fig. 2 is a plan view particularly showing the arrangement of the moding arm emif ployed between the throttle valve lever and liquid fuelvalve of the carburetor,

Fig. 3 is a fragmentary sectional view on an enlarged scale particularlyshowing the post en'iployed for swinging the coupling arm of the device,coincident with the swing ing movement of the throttle valve lever,

Fig. 4 is a fragmentary perspective view showing the clamping membersand collar employed for connecting the coupling arm witczlh the liquidfuel valve of the carburetor, an

Fig. 5 is a detail perspective view of the coupling post.

In order that the construction, mounting and operation of my improveddevice may be accurately understood, 1 have, in the drawings, shown thedevice in connection with a conventional type of carbureter 10 throughthe top plate of which is threaded an axial fuel valve 11 upstandingfrom the carburetor. Normally, this fuel valve is rotatably adjustedmanually and then fixed at adjustment by a lock nut 12 surroundin thevalve. Controlling the flow of fue mixture from the carbureter is athrottle valve 13 of the butterfly type. This throttle valve is carriedby a rotatable valve stem 14 to the upper end of which is fixed athrottle valve lever 15. The lever 15 is, at its inner extremity,provided with an enlarged head 16 upon which is formed oppositelydirected lugs 17 and 18 respectively. The lug 17 is adapted to cooperatewith a stop 19 upon the top plate of the carbureter for limiting thethrottle valve in its movement to closed position. The lug 18 is splitto provide coacting ears between which is threaded a stop screw 20extending through the lug and adapted to be held at adjustment by aclamping screw 21 connecting the said ears. This clamping screw is alsoadapted to cooperate with the stop 19 for limiting the throttle valve inits movement to open position. As particularly shown in Fig. 3 of thedrawings, the throttle valve lever is inclined upwardly toward its outerextremity and, at its outer end, is formed with a pivot loop or lug 22loosely receiving the adjacent terminal of a throttle valve control rod23.

Coming now more particularly to the sub-- jcct of the presentimprovements I employ a substantially channel shaped throttle valve arm2% arranged in inverted position over the valve lever 15. This arm ispreferably formed of suitable sheet metal and at its inner extremity isprovided with a laterally and downwardly extending terminal 25 seatingagainst the head 16 of the lever 15. l*lx tending laterally atone sideof this terminal is an attaching lug 26 which overlies the lug 13 of thesaid lever and receives the clamping screw 21 for thus rigidly connecting the inner extremity of the arm with the lever. At its outerextremity the arm 2i is provided with an offset terminal 27 over lyingthe pivot loop 22 of the valve lever and receiving the control rod 23therethrough, which rod thus acts to lock the outer end of the arm inengagement with the lever. However, the lug 23 is formed at oppositesides thereof with depending at taching lugs or flanges 28 engagingaround opposite sides of the pivot loop 22 for thus firmly binding theouter end of the arm upon the valve lever. The said arm will thus berigidly connected with the valve lever to swing therewith and in thisconnection it is to be observed that the laterally directed terminal 25of the arm and the offset terminal 27 thereof will cooperate to supportthe arm in substantially horizontal position with respect to the lever.Formed through the top wall of the arm, medially thereof, is alongitudinally extending slot 29 and, at opposite sides of this slot,the inner face of the said wall is provided with teeth. or serrations30. The arm is thus adapted to form a supporting member for anupstanding post 31 slidably fitting at its lower extremity through theslot 29 and provided with an annular collar 32 su porting the postthereon. At its lower en the post is threaded to receive a nut 33 snuglyfitting within the channel of the supporting member and held by its sideflanges against turn ing movement. Upon its inner side this nut isprovided with teeth or serrations 34 adapted to cooperate with the teeth30. Thus, it will be seen that by rotating the post in one direction,the nut 33 thereof will e released so that the post may then be adjustedwithin the slot 29 longitudinally with respect to the valve lever 15toward or away from the axis of the throttle valve. Then, by rotatingthe post in the opposite direction, the said post will be clamped atadjustment upon the supporting member to be held against accidental(tlislmzatiou from adjustedposition by the engagenn-nt oi' the teeth 34of the nut 33 with the teeth ill) of the said member.

Removably titted around the fuel valve ll is a split attaching collar35. This collar is preferably formed of fiber or other simi larn'iatcrial and at its ends is provided with overhanging annular flanges36. Engaging around the collar bctween these flanges is an attachingclamp including reversely bowed clanipin members 37 pro vided at theirouter cm s with mating lugs 38 and. at their inner ends with mating op-'iositely offset lugs 39. Connecting the lugs 33 of the clamping membersis a screw or other suitable fastening device 40 and connecting the lugs39 is a Similar screw or other suitable fastening device -H. 'lhesescrews are preferably loosely iittcd through the lugs of one of the saidmembers and threaded upon the lugs of the other ol said members so thatthe said screws may thus be positioned for ad justably binding theclamping members about the collar 35. Consequently, this collar may becaused to grip the fuel valve sufficiently to turn or rotate the saidvalve from the clamp while, at the same time, the valve may be manuallyrotated and thus adjusted within the collar. Extending from theattaching clamp upon the fuel valve is a radial arm 42. This arm ispreferably formed from a strip of suitable sheet metal bent at its outerextremity to provide a loop 4-3 at the inner ends of which theextremities of the strip are brought into overlapping relation andsecured together by a rivet or other suitable fastening deviwe ll. Atits inner end the arm is received between the lugs 39 of the coactingmembers of the attaching clamp and is connected with the said lugs forpivotal adjustment upon the clamp by the screw 41 which extends throughthe adjacent terminal of the said arm and, preferably, the ends of thestrip forming the arm. are, upon the outer sides thereof, formed withannular serrated faces adapted to cooperate with similar faces upon theinner sides of the lugs for rigidly holding the arm at adjustment. Thearm 42 may thus be readily positioned to extend from the attaching clampto receive the post 31 through the loop 43 thereof, to connect the fuelvalve, in the manner best shown in Figs. 2 and 3 of the drawings, withthe throttle valve lever. This loop 43 in effect provides a slot in thearm slidably receiving said post so that when the throttle valve leveris swung, the post may freely shift within the said slot, it beingobserved, in this connection, that when the throttle valve is closed andthe fuel valve occupies its normal position of adjustment, the post willbe disposed, as best shown in Fig. 3, medially of the slot.

As will now be readily understood, swinging movement of the throttlevalve lever 15 to open or close this valve will cause the post 81 toswing therewith so that this post will, in turn, swing the arm 42 tocorrespondingly rotate the fuel valve 11 of the carburetor. In orderthat this fuel valve may be so rotated coincident with the movement ofthe throttle valve, the lock nut for the fuel valve is, of course,loosened to release the said fuel valve. lherefore, as the throttlevalve is opened or closed to accelerate or retard the speed of theengine to which the carburetor is connected, the fuel valve will beopened or closed in direct proportion to the opening or closing movementof the throttle valve. Accordingly, the fuel valve will be automaticallyregulated to effect an increase or decrease in the How of fuel mixturewithin the carbureter in direct ratio to any increase or decrease in thespeed of the engine so that as the engine speed is accelerated therichness of the fuel mixture will be proportionately increased while,

when the en ine speed is decreased, the richness of the 'uel mixtureWill be proportion ately decreased. A proper fuel mixture at practicallyall engine speeds will thus be insured. Since the fuel valve may, aspreviously intimated, be manually rotated independently of the arm 42,initial adjustment of this valve for regulating the normal speed of theengine may be readily had. However, in order to properly regulate theopening or closing movement of the fuel valve, under the influence ofthe throttle valve lever, so as to vary the travel of the valve andaccord ingly regulate or vary the increase or de crease in the flow ofliquid fuel and consequent increase or decrease in the richness of thefuel mixture in relation to a given movement of the throttle valve, Iprovide the adjustment for the post 31. As will be seen, by adjustingthis post inwardly upon its supporting member, the arc to be describedby the post will be lessened in radius and the travel of the post withthe throttle valve lever accordingly decreased. Therefore, the swingingmovement imparted by the post to the arm 42 will also be decreased witha consequent decrease in the rotary adjustment of the fuel valve. On theother hand, by adjusting the post outwardly upon its supporting member,the arc to be described by the post will be increased in ra dius so thatan increased swinging movement will be imparted to the arm 42 with aconsequently increased rotary adjustment of the fuel valve. The ratio ofincrease and de crease in the richness of the fuel mixture with respectto an increase or decrease in the flow of such mixture may thus bereadily regulated so as to attain the best results in the operation ofthe engine for all engine speeds.

I, therefore, provide a particularly eflicient device for the purposeset forth. Furthermore, it will be noted that my improved device isparticularly simple in construction and may be readily applied todifferent car bureters of conventional type Without the necessity forany structural change therein.

Having thus described the invention, what is claimed as new is:

1. A device of the character described including a supporting memberadapted for rigid connection to the throttle valve lever of a carbureterto overlie the lever extending longitudinally thereof, an arm adaptedfor attachment to a carbureter fuel valve. and means carried by saidsupporting member and coacting with said arm to form an operativeconnection tlicrehei ween for swii'iging the arm from said member.

2. A device of the character described in cluding a supporting memberadapted or rigid connection to the throttle valve lover of a carbureterextending longitudinally of the lever, an arm adapted for attachment toa carbureter fuel valve, and means carried by said supporting member andcoacting with said arm to form an operative connection thereb-etween forswinging the arm from said member, said means being slidably adjustableupon the member for varying the travel of the arm.

3. A device of the character described including a supporting memberadapted for rigid connection to the throttle valve lever of acarbureter, an arm adapted for attachment to a carburetor fuel valve.and a post carried by said supporting member and slid ably engaging saidarm to form an operative connection therebetween for swinging the armfrom said member.

4. A device of the character described including a supporting memberadapted for rigid connection to the throttle valve lever of acarbureter, an arm adapted for attachment to a carburetor fuel valve andprovided with a slot, and means carried by said supporting member andloosely engaging in said slot to form an operative connection betweenthe arm and member for swinging the arm from the said member.

5. A device of the character described including a supporting memberadapted for rigid connection to the throttle valve lever of acarburetor, an arm adapted for attachment to a carbureter fuel valve,and means carried by said supporting member and coacting with said armto form an operative connection therebetween for swinging the arm fromsaid member, the arm being swingingly adjustable in a plane at rightangles to the member to cooperate with said means.

6. A device of the character described including a supporting memberadapted for attachment to the tl'irottlr valve lever ol a carburetor, anattaching clamp formed of companion clamping n'ieinbers adapted foradjustable engagement with a carburetor r'uel valve, an arm carried bysaid clamp, and nn-uns carried by said supporting meniher and eoaetingwith said arm to form an operative connection therebetween for swingingthe arm from said mei'nbei'.

T. A device of the character described ineluding a supporting memberadapted for attachment to the throttle valve lever of a carburetor, anarm formed from a strip of material bent to deline a loop and adaptedfor attachment to a carbureter fuel valve, and means carried by saidsupporting member and loosely engagingin said loop to form an operativeconnection therebetween for swingii'ig the arm from said member.

8 A device of the character described in cluding a supporting memberadapted for attachment to the throttle valve lever oi a earbureter toextend radially with respect to the axis of the valve, an arm adaptedfor attachment to a carburetor fuel valve to extend radially therefrom,and means adjustable longitudinally upon said supporting member andcoacting With said arm to form an operative connection therebetween forswinging the arm from said member.

9. A device of the character described including a supporting memberadapted for attachment to the throttle valve lever of a carburcter andprovided with a slot, an arm adapted for attachment to a carhureter fuelvalve, and a post adjustable in said slot longitudinally of said. memberand coacting with the arm to form an operative connection therebetweenfor swinging the arm from said member.

10. A device of the character described including a substantiallychannel shaped supporting bar adapted for attachment to the throttlevalve lever of a carbureter and provided with a slot in its bodyWalLanarm adapted for attachnient to a carbureter fuel valve a postfitting through said slot and provided with a shoulder coacting with thesupporting member to support the post thereon, and a nut held Within thechannel of the supporting member and engaged with the post to connectthe post with said mom-- her for adjustment in said slot longitudinallyof the member, the post coaetin with said arm to form an operativeconnection between the arm and member for swinging the arm from saidmember.

In testimony whereof I afiix my signature.

EDMUND o. SATHER. 1 8.

Copies of this patent may be obtained for five cents each, by addressingthe Commissioner of Patents, Washington, D. G."

